3par: Delete (missing) snapshot stuck in error deleting

[Ramy Asselin]

Steps to reproduce:
1. Create a snapshot.
2. Manually delete it from 3PAR outside of cider
3. Delete the snapshot from cinder.

Result: Snapshot stuck in error deleting state

Expected Result: Snapshot removed from cinder.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/75982

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/75982
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=e31b9e78374bcaeae573cce2915897ceb870ffc3
Submitter: Jenkins
Branch: master

commit e31b9e78374bcaeae573cce2915897ceb870ffc3
Author: Ramy Asselin <email address hidden>
Date: Mon Feb 24 12:29:01 2014 -0800

    3PAR: Delete missing snapshot stuck in error_del

    If the snapshot is deleted outside of cinder, attempting
    to delete it again results in the snapshot state stuck in
    error_deleting.

    This is because the current code raises a NotFound exception,
    but the base cinder code does not catch this and update its db.

    Instead, log a warning, and simply tell the base cinder code that it was
    successfully deleted.

    Change-Id: I5c5d24bc113e320346ff4f1f4f62fffdf7cddfc4
    Closes-Bug: #1283233